An idea for making translations easier and reducing cheating via Google Translate.

When you get stuck on a sentence, it's annoying to just give up and look for another one because the effort you put into the translation feels wasted.

So why not provide users with the option to see the DuoBot translation to help them out? The cost would be that they would not earn as many credits and maybe Duolingo would not have others rate it (to avoid biasing other peoples' translations).